Journal Article10.1364/AO.45.004567
Optical fiber long-period grating humidity sensor with poly(ethylene oxide)/cobalt chloride coating
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TL;DR: A long-period fiber grating (LPFG) humidity sensor is reported utilizing poly(ethylene oxide)/cobalt chloride (PEO/CoCl2) as a hybrid hygrosensitive cladding coating.
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Abstract: A long-period fiber grating (LPFG) humidity sensor is reported utilizing poly(ethylene oxide)/cobalt chloride (PEO/CoCl2) as a hybrid hygrosensitive cladding coating. A thin overlay of the material is deposited on the LPFG and with exposure to different ambient humidity levels, its spectral properties are modified. The material parameters associated with the sensing mechanism may include those of refractive index, absorption, and morphological alterations of the overlaid material. Relative humidity variations in the range from 50% to 95% have been detected with a resolution better than 0.2%. The response time constant of the fiber sensor is of the order of a few hundred milliseconds.
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Citations
Ultrafast Microfiber Humidity Sensor Based on Three Dimensional Molybdenum Disulfide Network Cladding
Pan Guo,Danting Cui,Qiaofeng Dai,Hongda Cheng,Jianhui Yu,He-lan Guan,Yunhan Luo,Hui Liu,Yihong Xiao,Yongchun Zhong,Wen Xia Zhu,Zhe Chen +11 more
TL;DR: In this article , the authors demonstrate an ultrafast humidity micro-fiber sensor based on molybdenum disulfide (MoS2) cladding with three dimensional network structure.
Research and Implementation on Temperature and Humidity Measurement System Based on FBG
Luo Ying-xiang
- 01 Jan 2013
TL;DR: In this paper, a distributed fibber Bragg grating temperature and humidity measurement system, the clock pulse broadband light source, combined with time division and wavelength division multiplexing fiber Bragg sensor network technology, was designed.
Study on fabrication and sensing characteristics of a D-shaped fiber long-period fiber grating
Hou Li,Bin Liu,Jun Liu,Zabih Ghassemlooy,Qiang Wu +4 more
- 20 Jul 2022
TL;DR: In this article , a long-period fiber grating (LPFG) structure based on D-shaped fiber is proposed, where a graphene oxide (GO) film layer is deposited on the fiber by the dipping method to jointly construct a new humidity sensor.
Advanced Nanomaterials for Humidity Sensing
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Determination of thermo-optic coefficient in liquids with fiber Bragg grating refractometer
Ricardo Canute Kamikawachi,Ilda Abe,Aleksander S. Paterno,H.J. Kalinowski,Marcia Muller,João L. Pinto,José Luís Fabris +6 more
TL;DR: In this article, the authors used etched fiber Bragg grating (FBG) to determine the thermo-optic coefficients of hydrocarbon samples, where the effective refractive index (RI) of the fundamental mode becomes dependent on the surrounding this article.
References
Long-period fiber gratings as band-rejection filters
Ashish Madhukar Vengsarkar,Paul Joseph Lemaire,J. B. Judkins,Vikram Bhatia,Turan Erdogan,John E. Sipe +5 more
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
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Optical fibre long-period grating sensors: characteristics and application
Stephen W. James,Ralph P. Tatam +1 more
TL;DR: In this paper, the authors reviewed recent research on fiber optic long-period gratings (LPGs) with emphasis placed upon the characteristics of LPGs that make them attractive for applications in sensing strain, temperature, bend radius and external index of refraction.
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Optical fiber humidity sensor based on a tapered fiber coated with agarose gel
TL;DR: An optical fiber humidity sensor (OFHS) was fabricated using a hydrophilic gel (agarose) deposited on the thinner zone of a biconically tapered single-mode optical fiber as discussed by the authors.
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Long period gratings as solution concentration sensors
TL;DR: In this article, an optical fiber long-period grating (LPG) was used for the refractometry of sodium chloride, calcium chloride and ethylene glycol aqueous solutions.
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Optical sensor for the determination of moisture
A.P. Russell,K.S. Fletcher +1 more
TL;DR: The spectrum of cobalt chloride on the fiber is similar to a transmission spectrum rather than an attenuated totla reflection (a.t.r.) spectrum because of the refractive index of the film which is slightly greater than that of the fiber.
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